#17979: Reimplementation of IntegerListsLex
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Reporter: aschilling | Owner:
Type: defect | Status: needs_review
Priority: blocker | Milestone: sage-6.6
Component: combinatorics | Resolution:
Keywords: days64 | Merged in:
Authors: Bryan Gillespie, | Reviewers: Nathann Cohen, Jeroen
Anne Schilling, Nicolas M. Thiery | Demeyer, Travis Scrimshaw
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/ticket/17979 | a939fd59bfcf043bce3c9a61ae072337961873da
Dependencies: | Stopgaps:
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Comment (by nthiery):
For the record:
{{{
sage: P = IntegerListsLex(n=40, max_slope=0, min_part=1)
sage: sage: %time x = list(P)
CPU times: user 14.9 s, sys: 23.7 ms, total: 15 s
Wall time: 15 s
}}}
This used to be 12s before I introduced the `Envelope` class. This is
due to the fact that we are not using anymore a ConstantFunction for
the floor in this case. We could special case that, but this slow down
should disappear as soon as `Envelope` will be Cythonized, so I'd say
that's good enough for now.
Cheers,
Nicolas
--
Ticket URL: <http://trac.sagemath.org/ticket/17979#comment:287>
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